Patent GB-384793-A (GB)
Title: Improvements in and relating to the manufacture of artificial textile materials, artificial straw, tubes, strips, and the like
IPC: D01F2/30
Filed: 1931-12-07
Abstract: Solutions of cellulose esters or ethers of at least 30 per cent concentration are extruded under high pressure, preferably while heating, through an annular orifice, and simultaneously, one or more textile threads, metal wires or the like, together with air or other gas are introduced through one or more bores within the annular orifice.  According to the amount of air introduced, the product will be of circular or more or less flat cross section. The threadlike inlay may or may not adhere to the outer covering, and if the inlay is impregnated or coated with a suitable softening material, a particularly intimate connection is obtained between the inlay and the covering where they come into contact. The cellulose ester or ether solution may be of 30 per cent to 70 per cent strength or more, and there may also be present plasticizers such as triacetin, also fillers, e.g. barium sulphate, gold bronze, pigments, oily substances, matting agents, and substances which lead to a weak gas development during the process.  Flat products may be obtained by passing the partly or not yet dried, and if necessary re-softened bodies, over or between smooth or ribbed rollers.  The hollow threads, bands, and in particular artificial straw so obtained find application in plaited work, weaving, and cord and rope making. Specification 239,622, [Class 2 (ii), Cellulose &c.], is referred to. The Specification as open to inspection under Sect. 91 refers also to the introduction into the hollow threads &c. of the air or other gas, or the thread-like inlays individually.  This subject-matter does not appear in the Specification as accepted.ALSO:Solutions of cellulose esters or ethers of at least 30 per cent concentration are extruded under high pressure, preferably while heating, through an annular orifice, and simultaneously, one or more textile threads, metal wires or the like, together with air or other gas are introduced through one or more bores within the annular orifice.  According to the amount of air introduced, the product will be of circular or more or less flat cross section. The threadlike inlay may or may not adhere to the outer covering, and if the inlay is impregnated or coated with a suitable softening material, a particularly intimate connection is obtained between the inlay and the covering where they come into contact. The cellulose ester or ether solution may be of 30 per cent to 70 per cent strength or more, and there may also be present plasticizers such as triacetin, also fillers, e.g. barium sulphate, gold bronze, pigments, oily substances, matting agents, and substances which lead to a weak gas development during the process. Flat products may be obtained by passing the partly or not yet dried, and if necessary re-softened bodies, over or between smooth or ribbed rollers.  The Specification as open to inspection under Sect. 91 refers also to the introduction in the hollow threads &c. of the air or other gas, or the thread-like inlays individually.  This subject-matter does not appear in the Specification as accepted.